Performance of a biosurfactant produced by Bacillus subtilis LAMI005 on the formation of oil / biosurfactant / water emulsion: study of the phase behaviour of emulsified systems
AUTOR(ES)
Sousa, M., Dantas, I. T., Feitosa, F. X., Alencar, A. E. V., Soares, S. A., Melo, V. M. M., Gonçalves, L. R. B., Sant'ana, H. B.
FONTE
Braz. J. Chem. Eng.
DATA DE PUBLICAÇÃO
2014-09
RESUMO
In this study, the phase behaviour of emulsified systems (oil + biosurfactant + water) was analyzed. The biosurfactant was produced in a 4-L batch bioreactor by Bacillus subtilis LAMI005, using residual glycerine from biodiesel production as a carbon source. Fourier Transform Infrared Spectroscopy (FT-IR), Nuclear Magnetic Resonance (NMR), and High Performance Liquid Chromatography (HPLC) analyses demonstrated that the biosurfactant produced by Bacillus subtilis (LAMI005) consists of a lipopeptide similar to surfactin. The influences of temperature and the composition of oil + biosurfactant + water were determined by using phase diagrams. Three types of oil were used, namely: motor oil, hydrogenated naphthenic oil (NH140) and castor bean oil. The emulsified systems were analyzed using optical micrography. The results presented here indicated that the biosurfactant produced in this work presents a potential use as stabilizing agent for oil-in-water emulsions.
Documentos Relacionados
- ProduÃÃo de biossurfactantes por Bacillus subtilis LAMI005 utilizando suco de caju clarificado
- Properties of a biosurfactant produced by Bacillus pumilus using vinasse and waste frying oil as alternative carbon sources
- Influence of the methodology on the formation of zeolite membranes MCM-22 for the oil/water emulsion separation
- Antimicrobial activity of a biosurfactant produced by Bacillus licheniformis strain M104 grown on whey
- The Behaviour of Acid-fast Bacteria in Oil and Water Systems 1